-/*
- * Histogram related operations.
- */
+/* hist.c - Histogram related operations.
+
+ Copyright (C) 2000 Free Software Foundation, Inc.
+
+ This file is part of GNU Binutils.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+\f
#include <stdio.h>
#include "libiberty.h"
#include "gprof.h"
static void scale_and_align_entries PARAMS ((void));
-/* declarations of automatically generated functions to output blurbs: */
+/* Declarations of automatically generated functions to output blurbs. */
extern void flat_blurb PARAMS ((FILE * fp));
-bfd_vma s_lowpc; /* lowest address in .text */
-bfd_vma s_highpc = 0; /* highest address in .text */
-bfd_vma lowpc, highpc; /* same, but expressed in UNITs */
-int hist_num_bins = 0; /* number of histogram samples */
-int *hist_sample = 0; /* histogram samples (shorts in the file!) */
+bfd_vma s_lowpc; /* Lowest address in .text. */
+bfd_vma s_highpc = 0; /* Highest address in .text. */
+bfd_vma lowpc, highpc; /* Same, but expressed in UNITs. */
+int hist_num_bins = 0; /* Number of histogram samples. */
+int *hist_sample = 0; /* Histogram samples (shorts in the file!). */
double hist_scale;
char hist_dimension[sizeof (((struct gmon_hist_hdr *) 0)->dimen) + 1] =
"seconds";
char hist_dimension_abbrev = 's';
-static double accum_time; /* accumulated time so far for print_line() */
-static double total_time; /* total time for all routines */
-/*
- * Table of SI prefixes for powers of 10 (used to automatically
- * scale some of the values in the flat profile).
- */
+static double accum_time; /* Accumulated time so far for print_line(). */
+static double total_time; /* Total time for all routines. */
+
+/* Table of SI prefixes for powers of 10 (used to automatically
+ scale some of the values in the flat profile). */
const struct
{
char prefix;
, /* ato */
};
-/*
- * Read the histogram from file IFP. FILENAME is the name of IFP and
- * is provided for formatting error messages only.
- */
+
+/* Read the histogram from file IFP. FILENAME is the name of IFP and
+ is provided for formatting error messages only. */
+
void
DEFUN (hist_read_rec, (ifp, filename), FILE * ifp AND const char *filename)
{
if (!s_highpc)
{
-
- /* this is the first histogram record: */
-
+ /* This is the first histogram record. */
s_lowpc = n_lowpc;
s_highpc = n_highpc;
lowpc = (bfd_vma) n_lowpc / sizeof (UNIT);
}
-/*
- * Write execution histogram to file OFP. FILENAME is the name
- * of OFP and is provided for formatting error-messages only.
- */
+/* Write execution histogram to file OFP. FILENAME is the name
+ of OFP and is provided for formatting error-messages only. */
+
void
DEFUN (hist_write_hist, (ofp, filename), FILE * ofp AND const char *filename)
{
UNIT count;
int i;
- /* write header: */
+ /* Write header. */
tag = GMON_TAG_TIME_HIST;
put_vma (core_bfd, s_lowpc, (bfd_byte *) hdr.low_pc);
for (i = 0; i < hist_num_bins; ++i)
{
bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & count[0]);
+
if (fwrite (&count[0], sizeof (count), 1, ofp) != 1)
{
perror (filename);
}
-/*
- * Calculate scaled entry point addresses (to save time in
- * hist_assign_samples), and, on architectures that have procedure
- * entry masks at the start of a function, possibly push the scaled
- * entry points over the procedure entry mask, if it turns out that
- * the entry point is in one bin and the code for a routine is in the
- * next bin.
- */
+/* Calculate scaled entry point addresses (to save time in
+ hist_assign_samples), and, on architectures that have procedure
+ entry masks at the start of a function, possibly push the scaled
+ entry points over the procedure entry mask, if it turns out that
+ the entry point is in one bin and the code for a routine is in the
+ next bin. */
+
static void
scale_and_align_entries ()
{
}
-/*
- * Assign samples to the symbol to which they belong.
- *
- * Histogram bin I covers some address range [BIN_LOWPC,BIN_HIGH_PC)
- * which may overlap one more symbol address ranges. If a symbol
- * overlaps with the bin's address range by O percent, then O percent
- * of the bin's count is credited to that symbol.
- *
- * There are three cases as to where BIN_LOW_PC and BIN_HIGH_PC can be
- * with respect to the symbol's address range [SYM_LOW_PC,
- * SYM_HIGH_PC) as shown in the following diagram. OVERLAP computes
- * the distance (in UNITs) between the arrows, the fraction of the
- * sample that is to be credited to the symbol which starts at
- * SYM_LOW_PC.
- *
- * sym_low_pc sym_high_pc
- * | |
- * v v
- *
- * +-----------------------------------------------+
- * | |
- * | ->| |<- ->| |<- ->| |<- |
- * | | | | | |
- * +---------+ +---------+ +---------+
- *
- * ^ ^ ^ ^ ^ ^
- * | | | | | |
- * bin_low_pc bin_high_pc bin_low_pc bin_high_pc bin_low_pc bin_high_pc
- *
- * For the VAX we assert that samples will never fall in the first two
- * bytes of any routine, since that is the entry mask, thus we call
- * scale_and_align_entries() to adjust the entry points if the entry
- * mask falls in one bin but the code for the routine doesn't start
- * until the next bin. In conjunction with the alignment of routine
- * addresses, this should allow us to have only one sample for every
- * four bytes of text space and never have any overlap (the two end
- * cases, above).
- */
+/* Assign samples to the symbol to which they belong.
+
+ Histogram bin I covers some address range [BIN_LOWPC,BIN_HIGH_PC)
+ which may overlap one more symbol address ranges. If a symbol
+ overlaps with the bin's address range by O percent, then O percent
+ of the bin's count is credited to that symbol.
+
+ There are three cases as to where BIN_LOW_PC and BIN_HIGH_PC can be
+ with respect to the symbol's address range [SYM_LOW_PC,
+ SYM_HIGH_PC) as shown in the following diagram. OVERLAP computes
+ the distance (in UNITs) between the arrows, the fraction of the
+ sample that is to be credited to the symbol which starts at
+ SYM_LOW_PC.
+
+ sym_low_pc sym_high_pc
+ | |
+ v v
+
+ +-----------------------------------------------+
+ | |
+ | ->| |<- ->| |<- ->| |<- |
+ | | | | | |
+ +---------+ +---------+ +---------+
+
+ ^ ^ ^ ^ ^ ^
+ | | | | | |
+ bin_low_pc bin_high_pc bin_low_pc bin_high_pc bin_low_pc bin_high_pc
+
+ For the VAX we assert that samples will never fall in the first two
+ bytes of any routine, since that is the entry mask, thus we call
+ scale_and_align_entries() to adjust the entry points if the entry
+ mask falls in one bin but the code for the routine doesn't start
+ until the next bin. In conjunction with the alignment of routine
+ addresses, this should allow us to have only one sample for every
+ four bytes of text space and never have any overlap (the two end
+ cases, above). */
+
void
DEFUN_VOID (hist_assign_samples)
{
unsigned int j;
double time, credit;
- /* read samples and assign to symbols: */
+ /* Read samples and assign to symbols. */
hist_scale = highpc - lowpc;
hist_scale /= hist_num_bins;
scale_and_align_entries ();
- /* iterate over all sample bins: */
-
+ /* Iterate over all sample bins. */
for (i = 0, j = 1; i < hist_num_bins; ++i)
{
bin_count = hist_sample[i];
- if (!bin_count)
- {
- continue;
- }
+ if (! bin_count)
+ continue;
+
bin_low_pc = lowpc + (bfd_vma) (hist_scale * i);
bin_high_pc = lowpc + (bfd_vma) (hist_scale * (i + 1));
time = bin_count;
+
DBG (SAMPLEDEBUG,
printf (
"[assign_samples] bin_low_pc=0x%lx, bin_high_pc=0x%lx, bin_count=%d\n",
bin_count));
total_time += time;
- /* credit all symbols that are covered by bin I: */
-
+ /* Credit all symbols that are covered by bin I. */
for (j = j - 1; j < symtab.len; ++j)
{
sym_low_pc = symtab.base[j].hist.scaled_addr;
sym_high_pc = symtab.base[j + 1].hist.scaled_addr;
- /*
- * If high end of bin is below entry address, go for next
- * bin:
- */
+
+ /* If high end of bin is below entry address,
+ go for next bin. */
if (bin_high_pc < sym_low_pc)
- {
- break;
- }
- /*
- * If low end of bin is above high end of symbol, go for
- * next symbol.
- */
+ break;
+
+ /* If low end of bin is above high end of symbol,
+ go for next symbol. */
if (bin_low_pc >= sym_high_pc)
- {
- continue;
- }
+ continue;
+
overlap =
MIN (bin_high_pc, sym_high_pc) - MAX (bin_low_pc, sym_low_pc);
if (overlap > 0)
(unsigned long) (sizeof (UNIT) * sym_high_pc),
symtab.base[j].name, overlap * time / hist_scale,
(long) overlap));
+
addr = symtab.base[j].addr;
credit = overlap * time / hist_scale;
- /*
- * Credit symbol if it appears in INCL_FLAT or that
- * table is empty and it does not appear it in
- * EXCL_FLAT.
- */
+
+ /* Credit symbol if it appears in INCL_FLAT or that
+ table is empty and it does not appear it in
+ EXCL_FLAT. */
if (sym_lookup (&syms[INCL_FLAT], addr)
|| (syms[INCL_FLAT].len == 0
&& !sym_lookup (&syms[EXCL_FLAT], addr)))
}
}
}
+
DBG (SAMPLEDEBUG, printf ("[assign_samples] total_time %f\n",
total_time));
}
-/*
- * Print header for flag histogram profile:
- */
+/* Print header for flag histogram profile. */
+
static void
DEFUN (print_header, (prefix), const char prefix)
{
if (total_time <= 0.0)
{
printf (_(" no time accumulated\n\n"));
- /* this doesn't hurt since all the numerators will be zero: */
+
+ /* This doesn't hurt since all the numerators will be zero. */
total_time = 1.0;
}
DEFUN (print_line, (sym, scale), Sym * sym AND double scale)
{
if (ignore_zeros && sym->ncalls == 0 && sym->hist.time == 0)
- {
- return;
- }
+ return;
accum_time += sym->hist.time;
+
if (bsd_style_output)
- {
- printf ("%5.1f %10.2f %8.2f",
- total_time > 0.0 ? 100 * sym->hist.time / total_time : 0.0,
- accum_time / hz, sym->hist.time / hz);
- }
+ printf ("%5.1f %10.2f %8.2f",
+ total_time > 0.0 ? 100 * sym->hist.time / total_time : 0.0,
+ accum_time / hz, sym->hist.time / hz);
else
- {
- printf ("%6.2f %9.2f %8.2f",
- total_time > 0.0 ? 100 * sym->hist.time / total_time : 0.0,
- accum_time / hz, sym->hist.time / hz);
- }
+ printf ("%6.2f %9.2f %8.2f",
+ total_time > 0.0 ? 100 * sym->hist.time / total_time : 0.0,
+ accum_time / hz, sym->hist.time / hz);
+
if (sym->ncalls != 0)
- {
- printf (" %8lu %8.2f %8.2f ",
- sym->ncalls, scale * sym->hist.time / hz / sym->ncalls,
- scale * (sym->hist.time + sym->cg.child_time) / hz / sym->ncalls);
- }
+ printf (" %8lu %8.2f %8.2f ",
+ sym->ncalls, scale * sym->hist.time / hz / sym->ncalls,
+ scale * (sym->hist.time + sym->cg.child_time) / hz / sym->ncalls);
else
- {
- printf (" %8.8s %8.8s %8.8s ", "", "", "");
- }
+ printf (" %8.8s %8.8s %8.8s ", "", "", "");
+
if (bsd_style_output)
- {
- print_name (sym);
- }
+ print_name (sym);
else
- {
- print_name_only (sym);
- }
+ print_name_only (sym);
+
printf ("\n");
}
-/*
- * Compare LP and RP. The primary comparison key is execution time,
- * the secondary is number of invocation, and the tertiary is the
- * lexicographic order of the function names.
- */
+/* Compare LP and RP. The primary comparison key is execution time,
+ the secondary is number of invocation, and the tertiary is the
+ lexicographic order of the function names. */
+
static int
DEFUN (cmp_time, (lp, rp), const PTR lp AND const PTR rp)
{
double time_diff;
time_diff = right->hist.time - left->hist.time;
+
if (time_diff > 0.0)
- {
- return 1;
- }
+ return 1;
+
if (time_diff < 0.0)
- {
- return -1;
- }
+ return -1;
if (right->ncalls > left->ncalls)
- {
- return 1;
- }
+ return 1;
+
if (right->ncalls < left->ncalls)
- {
- return -1;
- }
+ return -1;
return strcmp (left->name, right->name);
}
-/*
- * Print the flat histogram profile.
- */
+/* Print the flat histogram profile. */
+
void
DEFUN_VOID (hist_print)
{
bfd_vma addr;
if (first_output)
- {
- first_output = FALSE;
- }
+ first_output = FALSE;
else
- {
- printf ("\f\n");
- }
+ printf ("\f\n");
accum_time = 0.0;
+
if (bsd_style_output)
{
if (print_descriptions)
{
printf (_("Flat profile:\n"));
}
- /*
- * Sort the symbol table by time (call-count and name as secondary
- * and tertiary keys):
- */
+
+ /* Sort the symbol table by time (call-count and name as secondary
+ and tertiary keys). */
time_sorted_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
+
for (index = 0; index < symtab.len; ++index)
- {
- time_sorted_syms[index] = &symtab.base[index];
- }
+ time_sorted_syms[index] = &symtab.base[index];
+
qsort (time_sorted_syms, symtab.len, sizeof (Sym *), cmp_time);
if (bsd_style_output)
{
- log_scale = 5; /* milli-seconds is BSD-default */
+ log_scale = 5; /* Milli-seconds is BSD-default. */
}
else
{
- /*
- * Search for symbol with highest per-call execution time and
- * scale accordingly:
- */
+ /* Search for symbol with highest per-call
+ execution time and scale accordingly. */
log_scale = 0;
top_dog = 0;
top_time = 0.0;
+
for (index = 0; index < symtab.len; ++index)
{
sym = time_sorted_syms[index];
+
if (sym->ncalls != 0)
{
time = (sym->hist.time + sym->cg.child_time) / sym->ncalls;
+
if (time > top_time)
{
top_dog = sym;
}
}
}
+
if (top_dog && top_dog->ncalls != 0 && top_time > 0.0)
{
top_time /= hz;
+
while (SItab[log_scale].scale * top_time < 1000.0
&& ((size_t) log_scale
< sizeof (SItab) / sizeof (SItab[0]) - 1))
}
}
- /*
- * For now, the dimension is always seconds. In the future, we
- * may also want to support other (pseudo-)dimensions (such as
- * I-cache misses etc.).
- */
+ /* For now, the dimension is always seconds. In the future, we
+ may also want to support other (pseudo-)dimensions (such as
+ I-cache misses etc.). */
print_header (SItab[log_scale].prefix);
+
for (index = 0; index < symtab.len; ++index)
{
addr = time_sorted_syms[index]->addr;
- /*
- * Print symbol if its in INCL_FLAT table or that table
- * is empty and the symbol is not in EXCL_FLAT.
- */
+
+ /* Print symbol if its in INCL_FLAT table or that table
+ is empty and the symbol is not in EXCL_FLAT. */
if (sym_lookup (&syms[INCL_FLAT], addr)
|| (syms[INCL_FLAT].len == 0
&& !sym_lookup (&syms[EXCL_FLAT], addr)))
- {
- print_line (time_sorted_syms[index], SItab[log_scale].scale);
- }
+ print_line (time_sorted_syms[index], SItab[log_scale].scale);
}
+
free (time_sorted_syms);
if (print_descriptions && !bsd_style_output)
- {
- flat_blurb (stdout);
- }
+ flat_blurb (stdout);
}
projects / deliverable / binutils-gdb.git / blobdiff